Malicious PDF — malware analysis report

Static analysis result for SHA-256 411f579825b152e8…

MALICIOUS

PDF

61.6 KB Created: 2021-09-02 18:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ee4b327837e8b8794b75eb7d768e36c2 SHA-1: d785c7f12112dc040f67c884aae620905c1a94b9 SHA-256: 411f579825b152e8772aeed436160907476871b7bbd4ea1a11eb1096422b9282
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The primary purpose seems to be redirecting users to external URLs, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4857

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ltssinternational.com/res/wysiwyg/file/wuganoteka.pdf In PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/n66248uhc28vr9ah6qnc4sh4vq/68242584528.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/c244c47cda45785421f4fc69542e7ea2/pinekosokawu.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a997b625ac1---37579011420.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/85931288986.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075d02d53249---rusofarivipoxesasa.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/rizos.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a096ad2e92b---wirepuzopupiv.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/50129893716.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/26454772067.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/25479663391.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/vetamuzijarurow.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/8488d4d2532f65aab440f72d8959ca7c/8996953848.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/mumiredanazogalobokokarut.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cab8ced5cb4---46395793128.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/od0ubuo24n9docclt0gs6tt499/xuwuzolavujofubized.pdfIn PDF document text
    • http://talcmanagement.com/uploaded_files/userfiles/files/pisimedabodakunukaxurife.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/70116403442.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/duvamazogetipak.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/faziramiraf.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/kre163d2k9gji6iluemg3llfph/56726508872.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/bosoluwudevodorosepowoso.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b65101e21b936c3a44ea572799b31f95/watovobiwepako.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=propositions+subordonn%C3%A9es+3%C3%A8me+pdfPDF link annotation

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